Commit 399bc486 authored Apr 01, 2011 by Linus Walleij Committed by Russell King May 12, 2011

ARM: 6858/1: mmci: force negative edge on clock bypass for ux500



This fixes a regression on high clock speeds with the MMCI on
ux500. We need to make sure we derive the passthru clock on the
falling edge of the incoming clock if it shall work at high
frequencies, and on the ux500's there is a special bit for this.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 49ac215e

drivers/mmc/host/mmci.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -103,6 +103,8 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
		if (desired) {
		if (desired >= host->mclk) {
		clk = MCI_CLK_BYPASS;
		if (variant->st_clkdiv)
		clk \|= MCI_ST_UX500_NEG_EDGE;
		host->cclk = host->mclk;
		} else if (variant->st_clkdiv) {
		/*